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  • 1
    Electronic Resource
    Electronic Resource
    Photodissociation of rovibrationally excited C2H2: Observation of two pathways (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 107 (1997), S. 385-391 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: C2H2 is prepared in the 2030000 (five quanta of C–H stretch) vibrational state and photodissociated by 243.135 nm photons that also probe the H photofragments via (2+1) resonance-enhanced multiphoton ionization (REMPI) in a time-of-flight mass spectrometer. The production of H atoms is greatly enhanced upon rovibrational excitation. The REMPI action spectrum shows the characteristic features of a Σu+–Σg+ band and mimics the absorption spectrum, except that the R(13) line intensity is an order of magnitude higher than that expected for a Boltzmann distribution. The maximum translational energy of the H atoms obtained from dissociation of the regularly distributed rotational states is 0.67±0.10, whereas for R(13) it is 1.34±0.10 eV. The observed intensities and linewidths indicate the existence of two photodissociation pathways following the preparation of C2H2, where the C2H fragment is produced in two different states. In the R(13) pathway an additional bent state is prepared, or an accidental coincidence resonance is involved. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.474399
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  • 2
    Electronic Resource
    Electronic Resource
    Two new all-organic complexes with electrical bistable states (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 2241-2242 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Two all-organic complexes, MC+TCNQ and BBDN+TCNQ, with electrical bistable states at room temperature have been discovered. The resistivity of these thin films prepared in vacuum can be transferred from high to low under a voltage of few volts. The transition time is 〈100 ns. Therefore, both materials are suitable for making write-once read-only memories. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.115116
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  • 3
    Electronic Resource
    Electronic Resource
    Over-expression of Gastrodia anti-fungal protein enhances Verticillium wilt resistance in coloured cotton (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 123 (2004), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Currently there are no adequate control measures for the cotton fungal diseases Verticillium wilt and Fusarium wilt, which are important factors limiting yield under certain conditions. In this study the gene encoding a Gastrodia anti-fungal protein was introduced into three cultivars of coloured cotton using the method of pollen-tube pathway transformation, with the purpose of obtaining transgenic plants with improved resistance to wilt. Of the 121 herbicide-resistant cotton plants two, LB-5-8 and ZB-1-49, were scored as transgenic based on Southern blot, RT-PCR analysis and in vitro anti-fungal activity assay. Field analysis demonstrated that the transgenic lines LB-5-8 and ZB-1-49 possess an increased resistance to wilt. After 2 years of breeding, the progeny of LB-5-8 and ZB-1-49 lines still showed a stable and strong resistance to Verticillium wilt. Lines with high levels of resistance to Verticillium wilt obtained from the present study may be widely planted and help to reduce the future impact of cotton wilt on cotton production resulting in increased yields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.2004.01005.x
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  • 4
    Electronic Resource
    Electronic Resource
    Rotational alignment of product molecules from the reactions Sr+CH"3Br, C"2H"5Br, n-C"3H"7Br, i-C"3H"7Br by means of PLIF
    Amsterdam : Elsevier
    Chemical Physics Letters 220 (1994), S. 281-285 
    Details
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-2614(94)00174-X
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  • 5
    Electronic Resource
    Electronic Resource
    Molecular beam studies of 3-C"3H"5Br and 1-C"3H"5Br. Competition between photodissociation and isomerization
    Amsterdam : Elsevier
    Chemical Physics Letters 204 (1993), S. 538-542 
    Details
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-2614(93)89200-2
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  • 6
    Electronic Resource
    Electronic Resource
    Transport of gases in miscible polymer blends above and below the glass transition region (1993)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 39 (1993), S. 1509-1518 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The study of diffusion and permeation of methane, nitrogen, and helium in miscible blends of poly(styrene-stat-acrylonitrile) (PSAN) and poly (methyl methacrylate) (PMMA) at 35-140°C shows that permeation coefficients (P) of helium followed the linear logarithmic mixing rule. Positive deviations from the linear logarithmic mixing rule were observed for permeation and diffusion coefficients (D) of methane and nitrogen below the glass transition temperature (Tg). The deviations decreased with increasing temperature and disappeared above Tg. The experimental results were analyzed by free volume and activated state theories. The Arrnenius plots of log D or log P vs. the reciprocal of temperature exhibited discontinuities in the glass transition region for all gases and blend compositions. The discontinuities are caused by large thermal expansion coefficient differences between the rubbery and glassy states of PSAN and PMMA. The sorption of methane in 50/50 PSAN/PMMA has dual-mode characteristics below Tg.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690390910
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  • 7
    Electronic Resource
    Electronic Resource
    Diffusion of gases in polymer blends near the lower critical solution temperature (1995)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 41 (1995), S. 166-170 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Gas diffusion through miscible blends of polystyrene (PS) with poly(vinyl methyl ether) (PVME) and poly(styrene-stat-acrylonitrile) (PSAN) with poly(methyl methacrylate) (PMMA) is studied from temperatures below the corresponding lower critical solution temperature (LCST) to temperatures above. The Arrhenius equation describes the temperature dependence of diffusion coefficients of pure components. Diffusion coefficients of methane in the 20/80 PS/PVME blend also follow the Arrhenius equation in the temperature ranges above and below their corresponding LCST; however, discontinuity is observed in the LCST region. In contrast to the PS/PVME blend, discontinuity in the LCST region is not obvious for nitrogen and methane in the 50/50 PSAN/PMMA blend. These phenomena are discussed in terms of free volume and morphology changes in the LCST region.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690410116
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